Works great! Obviously can't go as deep as a belly shot. Usually stick the pin in only about halfway. My neck tends to develop welts much, much more readily than my stomach, but once they've faded away, a tiny bit of fat has gone with them. 2iu ED adds up.
I've been doing gh exclusively in my neck for about a month because I knew I'd be trying lipostabil in my belly eventually and didn't want to mix the results. Started the lipo last week.
BTW, you can't use gh for face shots. Got goofy one day and tried to inject into my cheek. Must have hit a nerve because my entire cheek started spasming. I must have looked like Jim Carey.